CN114411745A - Post-grouting device for pile end of steel pipe pile and construction method thereof - Google Patents
Post-grouting device for pile end of steel pipe pile and construction method thereof Download PDFInfo
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- CN114411745A CN114411745A CN202210179405.0A CN202210179405A CN114411745A CN 114411745 A CN114411745 A CN 114411745A CN 202210179405 A CN202210179405 A CN 202210179405A CN 114411745 A CN114411745 A CN 114411745A
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- pile
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
Abstract
The invention provides a post-grouting device for a pile end of a steel pipe pile and a construction method thereof, wherein the post-grouting device for the pile end of the steel pipe pile comprises: the steel pipe pile is driven to the designed depth of the soil body by adopting a resonance-free hydraulic vibration hammer; the grouting pipe is vertically arranged in the steel pipe pile, the bottom end of the grouting pipe is positioned above the pile end of the steel pipe pile and has a preset distance with the pile end, and the top end of the grouting pipe is connected with grouting equipment through a grouting hose; and the closed pile head is arranged on the pile top of the steel pipe pile and seals the pile top. The sealed pile head is arranged on the pile top of the steel pipe pile to form a sealed space, the bottom end of the grouting pipe is located above the pile end, when grouting is conducted through the grouting pipe, slurry can permeate into the soil body in the steel pipe pile and the soil body at the pile end, and along with the increase of slurry injection amount, certain slurry returning is conducted on the periphery of the pile side by the slurry, the soil body in the steel pipe pile, the pile end and the soil body at the pile side are reinforced, the pile end is provided with the enlarged head, and therefore the bearing capacity of the pile foundation is greatly improved.
Description
Technical Field
The invention relates to the technical field of civil engineering construction, in particular to a post-grouting device for a pile end of a steel pipe pile and a construction method thereof.
Background
The high-frequency resonance-free pile sinking technology for the steel pipe pile has the advantages of small environmental influence and high construction efficiency, so the high-frequency resonance-free pile sinking technology is popularized and applied to municipal engineering with high environmental protection requirements or short construction period in recent years. However, in the high-frequency resonance-free pile sinking process, soil bodies on the pile side and the pile end are liquefied, the bearing capacity is obviously reduced, the bearing capacity of the steel pipe pile constructed by the high-frequency resonance-free technology is low, the pile body strength is high, and resource waste is caused.
Therefore, engineering personnel consider a pile side post-grouting method to improve the side resistance, and the concrete method mainly comprises the steps of welding a plurality of pile side grouting pipes on the outer wall of the steel pipe pile, then driving the steel pipe pile and the steel pipe pile into a soil body, and after pile sinking is in place, performing post-grouting through the pile side grouting pipes, so that the bearing capacity of the pile foundation is improved. However, in the method, because the grouting pipe is arranged on the outer wall, the grouting resistance is improved, resonance-free is difficult to realize in the pile sinking process, the surrounding environment is influenced to a certain extent, the pile foundation bearing capacity improved by the post-grouting on the side of the pile is limited, and the pile body strength cannot be fully utilized.
Disclosure of Invention
The invention aims to provide a post-grouting device for a pile end of a steel pipe pile and a construction method thereof, which can greatly improve the bearing capacity of the pile foundation, have simple process and low construction cost and cannot influence the surrounding environment.
In order to achieve the above object, the present invention provides a post-grouting device for a pile end of a steel pipe pile, comprising:
the steel pipe pile is driven to the designed depth of the soil body by adopting a resonance-free hydraulic vibration hammer;
the grouting pipe is vertically arranged in the steel pipe pile, the bottom end of the grouting pipe is positioned above the pile end of the steel pipe pile and has a preset distance with the pile end, and the top end of the grouting pipe is connected with a grouting device through a grouting hose;
and the closed pile head is arranged on the pile top of the steel pipe pile and seals the pile top.
Optionally, the closed pile head is a steel sealing plate, and the steel sealing plate covers the pile top and is connected with the pile top.
Optionally, the steel sealing plate is in threaded connection or welded with the pile top.
Optionally, the closed pile head is a cast-in-place concrete block, and the cast-in-place concrete block is located in the steel pipe pile and seals the pile top.
Optionally, a grouting device with a non-return function is arranged at the bottom end of the grouting pipe.
Optionally, the top end of the grouting pipe is connected with the grouting hose through a grouting steel sleeve.
Optionally, the number of the grouting pipes is multiple, and the plurality of grouting pipes are distributed along the circumferential direction of the steel pipe pile.
Optionally, the grouting pipe is a steel pipe, and the grouting pipe is welded and fixed with the inner wall of the steel pipe pile.
Optionally, the steel pipe pile is formed by vertically splicing at least two sub-steel pipe piles, and each grouting pipe is formed by vertically splicing at least two sub-grouting pipes.
Based on the above, the invention also provides a construction method of the post-grouting device for the pile end of the steel pipe pile, which comprises the following steps:
installing a grouting pipe on the inner wall of the steel pipe pile, wherein the bottom end of the grouting pipe is positioned above the pile end of the steel pipe pile and has a preset distance with the pile end;
driving the steel pipe pile to the designed depth of the soil body by adopting a resonance-free hydraulic vibration hammer;
after pile sinking is finished, installing a closed pile head on the pile top of the steel pipe pile to seal the pile top;
and (3) opening the plug of the grouting pipe by using high-pressure water, and grouting the pile end of the steel pipe pile through the grouting pipe after the plug is successfully opened.
The post grouting device for the pile end of the steel pipe pile and the construction method thereof provided by the invention have at least one of the following beneficial effects:
1) the pile top of the steel pipe pile is provided with a closed pile head to form a sealed space, and the bottom end of the grouting pipe is positioned above the pile end of the steel pipe pile and has a preset distance with the pile end, so that when grouting is performed through the grouting pipe, slurry can permeate into a soil body of the steel pipe pile and a soil body of the pile end, and certain slurry return is performed on the slurry along the periphery of the pile side along with the increase of the injection amount of the slurry, so that the soil body in the steel pipe pile, the pile end and the soil body on the pile side are reinforced, and an enlarged head is formed at the pile end, so that the bearing capacity of a pile foundation is greatly improved;
2) the grouting pipe is arranged in the steel pipe pile, so that the influence on the resonance-free hydraulic vibration hammer and the surrounding environment is small;
3) the process is simple and low in cost, only one grouting pipeline is added in the post-grouting technology of the pile end, and after the bearing capacity is improved, the high-strength material characteristics of the steel pipe pile can be fully utilized, so that the pile foundation cost is saved.
Drawings
It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation to the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of a post-grouting device for a pile end of a steel pipe pile according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a post-grouting device for a pile end of a steel pipe pile according to a second embodiment of the present invention;
wherein the reference numerals are:
10-steel pipe pile; 20-grouting pipe; 30-closing the pile head; 40-a slip casting machine; and 50-grouting a steel sleeve.
Detailed Description
To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. In addition, the structures shown in the drawings are often elements of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As used in this application, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this disclosure, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. As used in this disclosure, the term "plurality" is generally employed in its sense including "at least one" unless the content clearly dictates otherwise. As used in this disclosure, the term "at least two" is generally employed in a sense including "two or more" unless the content clearly dictates otherwise. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or at least two of the features.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a steel pipe pile end post-grouting device according to an embodiment of the present invention, and the embodiment provides a steel pipe pile end post-grouting device including:
the steel pipe pile 10 is driven to the designed depth of the soil body by adopting a resonance-free hydraulic vibration hammer;
the grouting pipe 20 is vertically arranged in the steel pipe pile 10, the bottom end of the grouting pipe 20 is positioned above the pile end of the steel pipe pile 10 and has a preset distance with the pile end, and the top end of the grouting pipe 20 is connected with a grouting device through a grouting hose;
and a closed pile head 30 which is provided at the pile top of the steel pipe pile 10 and seals the pile top.
The sealed pile head 30 is arranged at the pile top of the steel pipe pile 10 to form a sealed space, because the bottom end of the grouting pipe 20 is positioned above the pile end of the steel pipe pile 10 and has a preset distance with the pile end, when grouting is carried out through the grouting pipe 20, grout can permeate into soil bodies in the steel pipe pile 10 and soil bodies at the pile end, and along with the increase of grout injection amount, the grout can return to the soil bodies around the pile side to reinforce the soil bodies, the pile end and the soil bodies at the pile side in the steel pipe pile 10, and an enlarged head is formed at the pile end, so that the bearing capacity of a pile foundation is greatly improved. And since the grout pipe 20 is provided in the steel pipe pile 10, the influence on the resonance-free hydraulic vibratory hammer and the surrounding environment is small.
It should be explained that, the resonance-free hydraulic vibration hammer drives the steel pipe pile 10 to the designed depth to form the resonance-free micro-disturbance steel pipe pile 10, and during the driving process of the steel pipe pile 10, soil fluid on the inner side of the steel pipe pile is fluidized, so that the strength is significantly reduced, a soil plug is difficult to form, and the bearing capacity of the steel pipe pile 10 is reduced. Therefore, in order to further increase the strength of the soil in the steel pipe pile 10, to generate a soil plug effect, and to increase the bearing capacity of the steel pipe pile 10, the soil in the steel pipe pile 10 is reinforced by grouting the soil in the steel pipe pile 10 through the grouting pipe 20.
With continued reference to fig. 1, the closed pile head 30 is a steel sealing plate covering and connected to the pile top.
In this embodiment, the steel shrouding with pile bolck threaded connection. For example, a plurality of threaded holes are correspondingly formed in the ring surfaces of the steel sealing plate and the pile top, and then the steel sealing plate and the pile top are screwed into the corresponding threaded holes of the sealing plate and the pile top through fasteners such as bolts. Through threaded connection's mode so that will after the slip casting is accomplished the steel closing plate is pulled down, realizes reuse's purpose, practices thrift construction cost. In addition, in order to guarantee the sealing performance, sealing components such as a sealing ring and the like can be arranged between the steel sealing plate and the ring surface of the pile top, and the application does not limit the sealing components. Of course, the steel sealing plate and the pile top may also be connected by welding, which is not limited in this application.
In this embodiment, the shape of the steel sealing plate is not limited at all, and may be circular or square, as long as the steel sealing plate can cover the opening of the pile top.
With continued reference to fig. 1, the bottom end of the grouting pipe 20 is provided with a grouting device 40 having a non-return function. The grouting pipe 20 is used for post-grouting the pile end of the steel pipe pile 10, and the grouting device 40 (equivalent to a one-way valve) with a non-return function is arranged to effectively prevent silt in the soil from entering the grouting device 40 to cause blockage and influence subsequent grouting. Slip casting ware 40 with non return function is common slip casting ware 40 on the market, and this application is no longer repeated here.
In this embodiment, the bottom end of the grouting pipe 20 has a preset distance with the pile end, and the preset distance is usually not less than 1m, and can be adjusted according to actual conditions.
It should be understood that the top end of the grouting pipe 20 is not sealed when the pile top of the steel pipe pile 10 is sealed by the closed pile head 30, and the top end of the grouting pipe 20 can be connected with the grouting hose through the grouting steel sleeve 50, and the grouting hose can be connected with grouting equipment when grouting is needed.
Preferably, the number of the grouting pipes 20 is plural, and the plurality of grouting pipes 20 are distributed along the circumferential direction of the steel pipe pile 10. Through setting up many slip casting pipe 20 can carry out the slip casting simultaneously, improves the efficiency of slip casting. Further preferably, the plurality of grouting pipes 20 are uniformly distributed along the circumferential direction of the steel pipe pile 10, so that a circumferentially uniform reinforcing effect is formed at the bottom of the steel pipe pile 10, thereby preventing the steel pipe pile 10 from carrying eccentrically.
Of course, the number of the grouting pipes 20 is not limited in the present application, and may be one or multiple, and may be selected according to specific construction requirements. In addition, the distribution mode of the grouting pipes 20 is not limited in any way in the present application, and may be uniform, non-uniform or distributed according to a specific rule.
In this embodiment, the grouting pipe 20 is a steel pipe, and the grouting pipe 20 is welded and fixed to the inner wall of the steel pipe pile 10. The grouting pipe 20 is vertically arranged, an outer wall of the grouting pipe is in contact with an inner wall of the steel pipe pile 10, and the grouting pipe 20 and the steel pipe pile 10 can be fixedly connected in a spot welding manner or in a full welding manner, which is not limited in this application.
In this embodiment, according to the difference of the driving length of the steel pipe pile 10, the steel pipe pile 10 may be formed by vertically splicing at least two sub-steel pipe piles 10, and each grouting pipe 20 may be formed by vertically splicing at least two sub-grouting pipes 20, which is not particularly limited in this application.
Example two
With reference to fig. 2, fig. 2 is a schematic structural diagram of a post-grouting device for a pile end of a steel pipe pile according to a second embodiment of the present invention. The only difference from the first embodiment is that in the second embodiment, the closed pile head 30 is a cast-in-place concrete block which is located in the steel pipe pile 10 and seals the pile top. That is, after the pile sinking of the steel pipe pile 10 is completed, a concrete block may be cast in place inside a portion of the steel pipe pile 10 located on the ground, or if the pile top of the steel pipe pile 10 is lower than or flush with the ground, a portion of a soil body in the steel pipe pile 10 may be excavated to facilitate the cast in place of the concrete, which is not limited in the present application. Preferably, reinforcing steel bars are embedded in the concrete blocks so as to improve the strength and rigidity of the cast-in-place concrete blocks. After grouting, the cast-in-place concrete block is directly left in the steel pipe pile 10 without being removed to increase the strength and rigidity of the steel pipe pile.
Based on the above, with reference to fig. 1-2, the invention further provides a construction method of the post-grouting device for the pile end of the steel pipe pile, which includes the following steps:
s1, installing a grouting pipe 20 on the inner wall of the steel pipe pile 10, wherein the bottom end of the grouting pipe 20 is located above the pile end of the steel pipe pile 10 and has a preset distance with the pile end;
s2, driving the steel pipe pile 10 to the designed depth of the soil body by adopting a resonance-free hydraulic vibration hammer;
s3, after pile sinking is finished, installing a closed pile head 30 on the pile top of the steel pipe pile 10 to seal the pile top;
and S4, plugging the grouting pipe 20 with high-pressure water, and grouting the pile end of the steel pipe pile 10 through the grouting pipe 20 after successful plugging.
Specifically, step S1 is executed first, a grouting pipe 20 is installed on the inner wall of the steel pipe pile 10, and the bottom end of the grouting pipe 20 is located above the pile end of the steel pipe pile 10 and has a preset distance from the pile end. In this embodiment, the grouting pipe 20 is a steel pipe, and the grouting pipe 20 is vertically disposed in the steel pipe pile 10 and welded and fixed to the inner wall of the steel pipe pile 10.
The number and the distribution mode of the grouting pipes 20 are not limited, and it should be noted that when the steel pipe pile 10 is formed by vertically splicing at least two sub-steel pipe piles, it should be ensured that the number and the distribution positions of the grouting pipes 20 on each sub-steel pipe pile are corresponding, and then the steel pipe piles are spliced to form a complete grouting pipeline.
Preferably, the bottom end of the grouting pipe 20 is provided with a grouting device 40 having a non-return function. Can effectively prevent through setting up slip casting ware 40 (being equivalent to the check valve) that has the non return function that silt in the soil body from getting into slip casting ware 40 causes the jam, influences follow-up slip casting.
Then, step S2 is executed, and the steel pipe pile 10 is driven to the designed depth of the soil body by using the resonance-free hydraulic vibration hammer. Before construction, the position of the steel pipe pile 10 needing to be arranged is determined, coordinates are positioned and marked in a drawing, the construction process of the steel pipe pile 10 is simulated by modeling, the implementation feasibility of sleeving the steel pipe pile 10 is checked, and the coordinates of the steel pipe pile 10 to be driven are determined. Meanwhile, engineering geological drilling data, hydrological data and piling data are mastered before pile sinking, ground and underground obstacles must be processed, the site is leveled, the ground bearing capacity required by walking of the crawler crane is met, the construction site is level and solid, and if surface excavation is carried out, backfilling broken stones and compaction are required, so that normal operation of the crawler crane is met.
And step S3, after pile sinking is completed, installing a closed pile head 30 on the pile top of the steel pipe pile 10 to seal the pile top, and forming a sealed space by arranging the closed pile head 30 on the pile top of the steel pipe pile 10, wherein the bottom end of the grouting pipe 20 is located above the pile end of the steel pipe pile 10 and has a preset distance from the pile end, so that when grouting is performed through the grouting pipe 20, grout can permeate into the soil body in the steel pipe pile 10 and the soil body at the pile end, and as the injection amount of the grout increases, the grout returns to the periphery along the pile side to reinforce the soil body in the steel pipe pile 10, the pile end and the soil body at the pile side, and an enlarged head is formed at the pile end, thereby greatly improving the bearing capacity of the pile foundation.
The closed pile head 30 may be a steel sealing plate or a cast-in-place concrete block, which is not limited in this application.
And finally, executing step S4, namely, plugging the grouting pipe 20 with high-pressure water, and grouting the pile end of the steel pipe pile 10 through the grouting pipe 20 after successful plugging. In the embodiment, the steel pipe pile 10 is grouted by using a hydraulic principle, after the grouting pipe 20 is dredged by high-pressure water, the grouting pipe 20 is used for uniformly injecting grout into a stratum, the grout drives away moisture and air among soil particles in the modes of filling, permeation, compaction and the like and occupies the position of the soil particles, after a certain time, the original loose soil particles or cracks are cemented into a whole by the grout, a 'stone body' with a new structure, high strength and good chemical stability is formed, and the pile foundation bearing capacity of the steel pipe pile 10 is effectively improved.
In summary, the embodiment of the invention provides a post-grouting device for a pile end of a steel pipe pile and a construction method thereof, wherein a sealed pile head is arranged at the pile top of the steel pipe pile to form a sealed space, and since the bottom end of a grouting pipe is positioned above the pile end of the steel pipe pile and has a preset distance with the pile end, when grouting is performed through the grouting pipe, grout can permeate into soil in the steel pipe pile and soil at the pile end, and as the injection amount of the grout increases, the grout can return along the periphery of the pile side to a certain extent to reinforce the soil in the steel pipe pile, the pile end and the soil at the pile side and form an enlarged head at the pile end, so that the bearing capacity of a pile foundation is greatly improved. And because the slip casting pipe sets up in the steel-pipe pile, influence and the surrounding environment influence to exempting from resonance hydraulic pressure vibratory hammer are less.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a steel-pipe pile tip back slip casting device which characterized in that includes:
the steel pipe pile is driven to the designed depth of the soil body by adopting a resonance-free hydraulic vibration hammer;
the grouting pipe is vertically arranged in the steel pipe pile, the bottom end of the grouting pipe is positioned above the pile end of the steel pipe pile and has a preset distance with the pile end, and the top end of the grouting pipe is connected with a grouting device through a grouting hose;
and the closed pile head is arranged on the pile top of the steel pipe pile and seals the pile top.
2. The pile-end post-grouting device of a steel-pipe pile according to claim 1, wherein the closed pile head is a steel sealing plate covering the pile top and connected with the pile top.
3. The pile-end post-grouting device of a steel-pipe pile according to claim 2, wherein the steel sealing plate is screwed or welded to the pile top.
4. The post-grouting device for the pile end of the steel pipe pile according to claim 1, wherein the closed pile head is a cast-in-place concrete block, and the cast-in-place concrete block is positioned in the steel pipe pile and seals the pile top.
5. The pile-end post-grouting device for the steel-pipe pile according to claim 1, wherein a bottom end of the grouting pipe is provided with a grouting device having a non-return function.
6. The pile-end post-grouting device for a steel-pipe pile according to claim 1, wherein the top end of the grouting pipe is connected to the grouting hose through a grouting steel sleeve.
7. The pile-end post-grouting device for a steel-pipe pile according to claim 1, wherein the number of grouting pipes is plural, and the plural grouting pipes are distributed along a circumferential direction of the steel-pipe pile.
8. The post-pile-end grouting device for a steel-pipe pile according to claim 1, wherein the grouting pipe is a steel pipe, and the grouting pipe is welded and fixed to the inner wall of the steel-pipe pile.
9. The pile-end post-grouting device for the steel-pipe pile according to claim 1, wherein the steel-pipe pile is formed by vertically splicing at least two sub-steel-pipe piles, and each grouting pipe is formed by vertically splicing at least two sub-grouting pipes.
10. A construction method of a pile end post-grouting device for a steel pipe pile according to any one of claims 1 to 9, characterized by comprising the steps of:
installing a grouting pipe on the inner wall of the steel pipe pile, wherein the bottom end of the grouting pipe is positioned above the pile end of the steel pipe pile and has a preset distance with the pile end;
driving the steel pipe pile to the designed depth of the soil body by adopting a resonance-free hydraulic vibration hammer;
after pile sinking is finished, installing a closed pile head on the pile top of the steel pipe pile to seal the pile top;
and (3) opening the plug of the grouting pipe by using high-pressure water, and grouting the pile end of the steel pipe pile through the grouting pipe after the plug is successfully opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210179405.0A CN114411745A (en) | 2022-02-25 | 2022-02-25 | Post-grouting device for pile end of steel pipe pile and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210179405.0A CN114411745A (en) | 2022-02-25 | 2022-02-25 | Post-grouting device for pile end of steel pipe pile and construction method thereof |
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| Publication Number | Publication Date |
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| CN114411745A true CN114411745A (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210179405.0A Pending CN114411745A (en) | 2022-02-25 | 2022-02-25 | Post-grouting device for pile end of steel pipe pile and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115450218A (en) * | 2022-10-20 | 2022-12-09 | 上海市城市建设设计研究总院（集团）有限公司 | Pile side static pressure grouting pipe device of vibration sinking steel pipe pile and using method |
-
2022
- 2022-02-25 CN CN202210179405.0A patent/CN114411745A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115450218A (en) * | 2022-10-20 | 2022-12-09 | 上海市城市建设设计研究总院（集团）有限公司 | Pile side static pressure grouting pipe device of vibration sinking steel pipe pile and using method |
| CN115450218B (en) * | 2022-10-20 | 2024-03-12 | 上海市城市建设设计研究总院（集团）有限公司 | Application method of pile side static pressure grouting pipe device of vibration sinking steel pipe pile |
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